JavaScript切换语句 [英] JavaScript switch statement

问题描述

我在编写的一些JavaScript中遇到问题，其中Switch语句似乎没有按预期工作。

I have problem in some JavaScript that I am writing where the Switch statement does not seem to be working as expected.

switch (msg.ResultType) {
  case 0:
    $('#txtConsole').val("Some Val 0");
    break;
  case 1:
    $('#txtConsole').val("Some Val 1");
    break;
  case 2:
    $('#txtConsole').text("Some Val 2");
    break;
}

ResultType是0-2的整数值，我可以在FireBug中看到。在所有情况下，交换机将控制权转移到最终的中断语句，这意味着完全跳过所有逻辑。我缺少什么？

The ResultType is an integer value 0-2 and I can see that in FireBug. In all cases, the switch transfers control to the final break statement which means all the logic is completely skipped. What am I missing?

推荐答案

我确信一个开关在Actionscript中使用===进行比较，因为JS和AS两者都遵循ECMAScript标准，我猜这同样适用于JS。我的猜测是该值实际上不是数字，但可能是一个字符串。

I'm sure that a switch uses === for comparison in Actionscript and since JS and AS both follow the ECMAScript standard, I guess the same applies to JS. My guess is that the value is not actually a Number, but perhaps a String.

您可以尝试在交换机中使用parseInt（msg.ResultType）或使用字符串案件。

You could try to use parseInt(msg.ResultType) in the switch or use strings in the cases.

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